/*
 * Copyright (c) 1995, 2011, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */

package java.lang;

/**
 * An {@code Error} is a subclass of {@code Throwable}
 * that indicates serious problems that a reasonable application
 * should not try to catch. Most such errors are abnormal conditions.
 * The {@code ThreadDeath} error, though a "normal" condition,
 * is also a subclass of {@code Error} because most applications
 * should not try to catch it.
 * <p>
 * A method is not required to declare in its {@code throws}
 * clause any subclasses of {@code Error} that might be thrown
 * during the execution of the method but not caught, since these
 * errors are abnormal conditions that should never occur.
 *
 * That is, {@code Error} and its subclasses are regarded as unchecked
 * exceptions for the purposes of compile-time checking of exceptions.
 *
 * @author Frank Yellin
 * @jls 11.2 Compile-Time Checking of Exceptions
 * @see java.lang.ThreadDeath
 * @since JDK1.0
 */
public class Error extends Throwable {

  static final long serialVersionUID = 4980196508277280342L;

  /**
   * Constructs a new error with {@code null} as its detail message.
   * The cause is not initialized, and may subsequently be initialized by a
   * call to {@link #initCause}.
   */
  public Error() {
    super();
  }

  /**
   * Constructs a new error with the specified detail message.  The
   * cause is not initialized, and may subsequently be initialized by
   * a call to {@link #initCause}.
   *
   * @param message the detail message. The detail message is saved for later retrieval by the
   * {@link #getMessage()} method.
   */
  public Error(String message) {
    super(message);
  }

  /**
   * Constructs a new error with the specified detail message and
   * cause.  <p>Note that the detail message associated with
   * {@code cause} is <i>not</i> automatically incorporated in
   * this error's detail message.
   *
   * @param message the detail message (which is saved for later retrieval by the {@link
   * #getMessage()} method).
   * @param cause the cause (which is saved for later retrieval by the {@link #getCause()} method).
   * (A {@code null} value is permitted, and indicates that the cause is nonexistent or unknown.)
   * @since 1.4
   */
  public Error(String message, Throwable cause) {
    super(message, cause);
  }

  /**
   * Constructs a new error with the specified cause and a detail
   * message of {@code (cause==null ? null : cause.toString())} (which
   * typically contains the class and detail message of {@code cause}).
   * This constructor is useful for errors that are little more than
   * wrappers for other throwables.
   *
   * @param cause the cause (which is saved for later retrieval by the {@link #getCause()} method).
   * (A {@code null} value is permitted, and indicates that the cause is nonexistent or unknown.)
   * @since 1.4
   */
  public Error(Throwable cause) {
    super(cause);
  }

  /**
   * Constructs a new error with the specified detail message,
   * cause, suppression enabled or disabled, and writable stack
   * trace enabled or disabled.
   *
   * @param message the detail message.
   * @param cause the cause.  (A {@code null} value is permitted, and indicates that the cause is
   * nonexistent or unknown.)
   * @param enableSuppression whether or not suppression is enabled or disabled
   * @param writableStackTrace whether or not the stack trace should be writable
   * @since 1.7
   */
  protected Error(String message, Throwable cause,
      boolean enableSuppression,
      boolean writableStackTrace) {
    super(message, cause, enableSuppression, writableStackTrace);
  }
}
